Teen hit by car

A 17-year-old man is in hospital after being hit when two cars collided in Adelaide's northern suburbs.

Senior Constable Paul Noble says the accident happened just before 11:00pm on Main North Road at Salisbury Park.

"A 17-year-old youth from Blair Athol received serious head injuries and also chest injuries, he was taken to the Lyell McEwin Hospital, then transferred the Royal Adelaide Hospital in a serious condition," he said.